Issue with Vue.js where the v-if directive placed inside a v-for loop does not properly update when

I want to dynamically show elements from an array based on boolean values. However, I am facing an issue where the element does not disappear even after the boolean value changes.

<li v-for="(value, index) in list">
    <span> {{ value[0] }} </span>
    <span v-if='value[1]'> {{ value[2] }} </span>
</li>


var List = new Vue({
    el: "#List",
    data: {
        list: ['fizz', true, 0],

    },
    methods: {
        toggleItem: function(index) {
            this.list[index][1] = !this.list[index][1];
        },

    }
})

To test the functionality, I can run:

List.toggleItem(0)

Answer №1

To ensure that Vue can track changes and update the template when updating an array, it is recommended to use Vue.set();

For example:

Vue.set(value, 1, false);

Please note that simply updating like this value[1] = false; will not work as intended.

For more information, visit: https://v2.vuejs.org/v2/guide/list.html#Caveats

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